St. Charles County

The Siteman Cancer Center has operated a facility on the campus of Barnes-Jewish St. Peters Hospital since August 2005. We make it easier for patients living in St. Charles County and beyond to receive world-class cancer care close to home.

Our free-standing, 37,000 square foot building, located just south of the hospital, offers a full range of adult cancer services, including chemotherapy/infusion, radiation therapy, and support programs. We also provide a wide range of amenities, including portable DVD players, library books, and art supplies, so patients can make the most of their time with us

The St. Charles facility is staffed by Washington University medical oncologists, radiation oncologists and surgeons who practice at Siteman’s main campus in St. Louis and collaborate regularly with other Siteman and Washington University physicians. These doctors perform multidisciplinary care, coordinating their schedules so patients can see as many as three physicians in one trip and have their entire treatment plan determined in one visit.

Our staff includes registered nurses with specialized training in caring for cancer patients. A research coordinator is also available to talk with patients about possible participation in clinical trials, which provide access to new medications and treatments not available at most cancer centers.

Patients who come to our St. Charles location can also take advantage of a wide range of support services and therapies aimed at helping them feel their best as they undergo treatment for cancer. Some of our programs include Therapeutic Horticulture with the Missouri Botanical Gardens, Pet Therapy with therapy dogs, massage therapy, and virtual programs and services like gentle yoga. We also have trained social workers on staff who can help patients with specific problems at home or at work that might arise during treatment.

PDF of driving directions and a campus map


Video Introduction to St. Peters


At our St. Charles County building, parking is free and easy to find. There is a large lot directly outside our door, and it usually isn’t difficult to locate a space.

Patients and guests who would rather not walk to and from the building can be dropped off in the covered space at the entrance to the facility.


We have wheelchairs available for patients or visitors who need extra assistance.  Feel free to borrow one from the entryway of the building.

Treatments and Services

Our facility offers a wide range of treatments and services, including:

  • On-site registration
  • On-site lab testing
  • Retail pharmacy
  • 16 medical oncology exam rooms
  • 28 chemotherapy infusion bays and four private infusion rooms
  • A CT simulator for radiation therapy treatment planning
  • Seven radiation oncology exam rooms
  • Two state-of-the-art linear accelerators with a wide range of treatment capabilities including stereotactic body radiation therapy (SBRT), gating, and deep-inspiration breath hold (DIBH), which deliver precisely targeted radiation to tumors in the body
  • Brachytherapy treatment for prostate cancer
  • Oncology data management software that provides a paperless system for registration, scheduling, billing, lab reporting, order entry and charting
  • Scalp cooling
Location Amenities

At St. Charles County, we provide a number of amenities that can help make your visit more comfortable, including:

  • A garden visible from the chemotherapy area’s floor-to-ceiling windows
  • Two private family conference rooms
  • Internet access for patients, families and guests
  • Art supplies
  • A library cart
  • Portable DVD players that can be borrowed during treatment
  • Free coffee and snacks
  • Wi-Fi

Normal business hours:
Monday through Friday 8:00 a.m. to 4:30 p.m.

Pharmacy location:
150 Entrance Way
St. Peters, MO 63376

Contact information:
Phone:  636-916-9847
Fax: 636-916-9079
Contact:  Joe Buse

Support Services

Siteman Cancer Center offers a variety of support programs for patients and families at all of our locations. These programs range from support groups and exercise programs to educational sessions and pet therapy. Many of our services take place in a virtual format.


The following support programs are offered by the Siteman Cancer Center at Barnes-Jewish St. Peters Hospital. All programs except the Prostate Cancer support group and Look Good, Feel Better are held at the cancer center, 150 Entrance Way, St. Peters, MO 63376. For more information, call 636-916-9920.


Greater St. Louis Multiple Myeloma Support Group

This group is for interested patients, caregivers, family members and friends. The group is affiliated with the International Myeloma Foundation.

No physician order required. Call 636.928.WELL (8355) to register.

When: Ongoing

Where: Barnes-Jewish St. Peters Hospital, Medical Office Building 1, Suite 117


Kids Can! is a program designed to support children ages 4 to 12 who have a parent or significant caregiver with a diagnosis of cancer. It provides opportunities for kids to express their feelings through various activities in a safe and protective environment with a trained facilitator. Adults will be offered a program facilitated by a group leader. This program is supported by the Holt Foundation.

To register, call 636-916-9974.

When: Ongoing

Where: Siteman- St. Peters 150 Entrance Way, St Peters, MO 63376- Conference Room

Prostate Cancer Support Group

A support group for men diagnosed with prostate cancer.

To register, call 636-916-9947.

When: 2nd Wednesday of each month 6:00 p.m.-7:30 p.m.

Where: Siteman- St. Peters 150 Entrance Way, St Peters, MO 63376- Conference Room

Smoking Cessation Class & Support Group

Join anytime. Learning and support for those who are ready to quit smoking.

Free. Call 636.928.WELL (8355) to register.

When: Ongoing

Where: Barnes-Jewish St. Peters Hospital, Medical Office Building 1, Suite 117

Therapeutic Horticulture with the Missouri Botanical Gardens

The Therapeutic Horticulture team of the Missouri Botanical Garden brings nature to every Siteman location with activities designed especially for patients who are in infusion units or who have been admitted to an in-patient room. Hands-on activities like arranging flowers and creating herbal tea blends benefit patients’ well-being and encourage their creative expression. These sessions are highly personalized with one-on-one attention from a Therapeutic Horticulture team member and you.

When: Ongoing

Pet Therapy

On a regular basis, pet therapy volunteers take their highly trained and certified dogs to visit patients in both outpatient treatment areas and in-patient units. Interacting with animals have proven physical and mental health benefits for patients and can be a welcome comfort when you are with us. These teams rotate among all of our locations, so their visits times and days vary. You may not see one of our pet therapy teams at every visit. But it gives something to look forward to when they do walk into your room.

When: Ongoing

Massage Therapy

Healing Massage from the Healing Arts Center for patients and their caregivers.

When: daily

Where: Siteman Cancer Center—St. Peters, 150 Entrance Way, St. Peters, MO  63376


A gentle yoga class open to all patients.

When: Tuesdays & Thursdays 11:00-12:00pm

Where: Siteman Cancer Center—St. Peters, 150 Entrance Way, St. Peters, MO  63376

Social Workers

Social workers are available to help patients and families cope with the challenges and problems caused by cancer. They provide assistance with such issues as lodging and transportation, rehabilitation and hospice care, and advance directives. They also identify community resources related to housing, employment, legal issues and financial concerns. For more information or to reach a social worker at this facility, call 636-916-9974.

Siteman Psychology Service

Patients and family members who come to Siteman can make an appointment with a psychologist, free of charge, to discuss the emotional challenges posed by cancer and develop methods for coping.

For more information, visit our Siteman Psychology Service page.

Patient Stories
Where can patients see Siteman experts?

In addition to our facility, Siteman is conveniently located in six other locations across the St. Louis metro area. Those locations are: